Truck-socket plate for roller skates



June 30, 1925.

G. J. ERTL TRUCK SOCKET PLATE FOR ROLLER SKATES Filled July 2B. 1924 Patented June 30, 1925.

AUNITED STATES PATENT OFFICE.

GEORGE J'. ERTL, 0F CHICAGO, ILLINOIS, ASSIGNOR 'IO RICHARDSON BALL BEARING SKATE COMPANY, OF CHICAGO, ILLINOIS, 'A CORPORATION 0F ILLINOIS.

TRUCK-SOCKET PLATE FOR ROLLER SKA'IES.

Application filed July 28, 1924. Serial No. 728,679.

Tol all whom t may concern: 1

Be it known that I, GEORGE J. ERTL, a citizen of the United States, residing at Chicago, in the county of Cook and Stateof Illinois, have invented certain new and useful Improvements in Truck-Socket Plates -for Roller Skates, of which the following is a specification.Y 1 i My inventionl relates to improvements in the construction of truck socket plates for roller skates, and has for `its principal objectV the provision of an improved socket plate of the above character, which is so simplified in construction that it may be manufactured at a lower cost than the socket plates of'this character now in general use, and which will possess thedesired qualities oflightness and strength.

Prior to my invention, `it has been customary, in the' manufacture of roller skates of the betterY quality to make the truck socketplatesv in one piece by a series of metalA drawing operations, so as to provide 'greater strength than can be obtained from a casting of equalweight and at the same time avoid the-high cost of producing such parts by forging. While the drawn steel article of this character presents various advantages over castings `and forgings, its preferred configuration is such as to involve 4a large 4'number of difficult metal drawing operations which requirethe attention of highly skilled mechanics. and the use of expensive dies,all of which add to the manufacturing cost. f

One of the specilicobjects .of my invention is to provide an improved construction .which will overcome the above-mentioned and other incidental objections to truck socket plates heretofore-used and which will retain all of the advantages of strength and Vlightness present in the one-piece socket plate heretofore `made of drawn metal.

The` preferred embodiment of` my invention is illustrated in thev accompanying drawing, whereinV like charactersof reference designate corresponding.` parts, and `wherein' f. Y

Fig. 1 is .aside view of a roller skate, partly in section', illustrating thedevice of my invention invits operative position on roller skate. i Eig.. a vier it Perspective 0f a braak.

socket plate for roller skates constructed in accordance with my invention.

Fig. 3 is a view in perspective showing the bottom surface of the body portion of my invention.

Fig. 4 is a view in perspective ofa separately formed socket member adapted to be secured yto the body member shown in Fig. 3, and e Fig. 5 is a plan view of the blank from which the body member shown in Fig. 3 is formed. i

In Fig. 1 of the drawing I have shown a roller skate construction in which my improved truck socket member of the type herein shown is particularly suitable for use. In the skate construction illustrated 10 designates a heel plate, 11 a toe plate, and 12 a reenforcing bridge secured to the heel and toe plate at 13 and 14 respectively, and having its ends bent downwardly for attachment to the front and rear trucks of the skate.

The rear and front trucks are of iden# tical construction, consisting in each case, of a. pair of rollers 15, revoluble on an axle 16, a bracket 17, and a resilient buffer element 18 supported on one end of theJ bracket.

Socketmembers 19 and 2O are secured to the heel and toe` plates to provide for the attachment of the trucks thereto. -These socket members comprise in each case a body portion 21 formed at one end with a socket portion 22 toV receive the end 23 of the Vbracket 17 and provided at the other end with. a depending,. diagonally disposed socket portion 24, adapted to receive the threaded end'of anattaching screw 25. The screw 25 preferably extends through the end 26 of the bracket 17, the buffer 18 and one end of the arch member 12 so thatv these tions by metal drawing operations, I prei?n erably form the body 21 and the socket portion 24 separately, and secure them rigidly and perninently together. 'Ihe body portion is preferably formed from a sheet metal blank of the configuration shown inF-ig. 5, pierced with holes 27 for the attachingl rivets 28 and with openings 29 and SO. The blank is pressed between suitable dies, so as to press the margin of the opening 29 downwardly to provide the socket p`ortio1r22 vand to press themargin of the openingl 30 down- Vwardly to form a relatively shallow iiange 3.1, the lower edge of which is at right angiesV tothe airis of the socket portion 24. TheV socket portion 24rof the member is made from a. metal bar which may AbeturnedV down in a. vsuitable 'lathe to provide a bead "32 at one'ven'd and to provide a. reduced portion 33 at the other end; The socket mem-V ber 24, after being drilled withrthe 'central opening" 34, is secured to the bodyy 21 Lby inserting the reduced portion 21B-,in thd opening 30Y of the .body portion and Haring the reduced Nend outwardly as Ashown in Figs. l `and 2. The internal threads may be cut in the 'socketportion either betereVV or after it issecured to the body.

Vhile I have ldescribed my invention in connection `lwith onel specific embodiment, it

will be obvious that various forms ot socket platesmay be made without departure from the `spirit oit my invention. I therefore contempla-te, by 'this invention, all modifications .in structure as come within the 'scope of 'the appended claims'.

l. A roller skate truck -socket comprising a flat body portion adapted tobe secured to the 'foot-plate of the skate, and a separately 'formed socket `portion secured to the body portion. e, Q

2. A roller skate truckfsocket comprising body Aportion ot'sheet (metal and a separately formed 'socket 'portion secured thereto. 3. A ro'ller skate truck A'socket comprisinga ltlat ybody 'formed with an integral socket v portion, and afseparately kformed socket por- "tionfsecured'to the bod'y at aposition spaced fr'ointhe integral socket. Y Y 'Y Y' A 4. A rollerskate tru ck socket comprising .a 'sheet "metaljbody one portion of which is depressed to forni a. socket portiontor receiving one fend of a truck braeket, and 'a separately* formed 'socket portion 'for receiving the other 'end .off the *bracket secured to a different 'portion .oft "the lsheet 'metal body.

5v. A roller skate truck socket comprising sheet metal. 'body adapted to :be Vsecured to lthe footgpite of l'the skate and formed 'at one end with downwardly' pressed-portion to proyidea fs/ocket forreceivin'g one enfd oi a truck trac-ref. ,a1-'r -proviaerthe other end 2with a sjparitely formed socket portion se- 6. A roller skate truck socket comprisin a sheet metal body formed at one end wit a downwardly pressed portionlto provide a socket for receiving one end of e truck bracket and provided at the other end with a separately formed socket portion secured permanently to the under face thereof so as to extend downwardly at an angle thereto.

7. A roller skate truck socket comprising a pressed metal body formed Vat one en with a socket to receive one end of a truck bracket and at the other end with a depressed portion, and a separately formed socket portion secured to said depressed portion.

a.V pressed metalbody formed `at one end Wit a socket to receive one endof a truck bracket and at the other end with a depressed portion, the lower edge of which is at an angle to the bottom face of the body, and a sepa- 8. A roller skate truck socket comprising ra-tely formed socket portion secured to said depressed portion'.

9. A-r'oller skate truck socket `comprising a sheet metal body pierced with openings, the margin "of one opening being pressed downwardly vto provide a socket to receive one end of a truck bracket, and the margin of the other opening being pressed down Lto provide a downwardly extending iiangmand a separately formed `socket member seelrred to said downwardly extending ange; the separate socket member being formed-with a reduced end portion 'adapted to "be flared outwardly Aagainst the inner wall of said downwardly extending ange to secure said separate member thereto.

10. A roller skate vtruck socket comprising a sheet metal body pierced with openings, Vthe margin of one ofwh-ich is pressed downwardly at an oblique angle `to the body to provide a socket to receive one end oif'a truck-bracket, the margin of "the other being pressed downwardly 'to provide a downwardly .extending flange, 'and a'separately formed socket provided with internal threads to receive a threaded attaching anda .separatelylformed socket portion hav- 'ing` one end secured in Ithistmening.`

12.v A `roller skate truck socket 'comprising a sheetl metal body portion formed with an opening the edges of which `are depressed, and 'a `sepamtely 'formed socket portion`having-a reduced end 'secured fin this opening.

413. A roller skate truck socket `comprising a "sheet fmetai body portion -formedwith an opening the edges of which are depressed, and a separately formed socket portion having a hollow reduced end portion inserted in this opening, and held in place by the engagement of the depressed edges of the body portion With the reduced portion, and by expanding the reduced end of the socket portion into the flared end of the opening left by the depressed edges.

14. A roller skate truck socket comprising a sheet metal body portion formed with an opening the edges of which are depressed more at one side of the opening than the other to form a tubular passage inclined to 

